Like Alsacienne I have to disagree with superfrac.
My first trip to Italy was 33 years ago with my 9 month old son. Everybody said you mustn't take a child that age abroad! My anwer was then, and I'd give the same answer now, they have been bringing up kids as long as we have.
We went by car, a little old Renault 4, from Liverpool - to halfway down the Adriatic. Stopping overnight through France, the Italian Riviera, Pisa and Florence - then to the coast for the last week.
The attention we recieved especially in Italy was fantastic. Even Roberto the beach guard baby sat for us, so we could go swimming together. Car park attendants made us park in what we thought not good places to leave the car - on return, was this little car in full shade. There was a heat wave at the time with temperatures in the 90's, and this is September.
We took all the baby food with us as we did not know the situation then. Today could well be different as shopping is international and you should get your favourite brand locally. I would make enquiries though. It might be worthwhile if your flying to pay for extra baggage and take the food with you - if needed!!!
The Italians are very baby minded and will love you for taking your children and show it!
My advice - do it. You won't regret it.
Peter
PS Any more info just ask.